CN202415575U - System for utilizing waste heat of slag quenching water of blast furnace - Google Patents
System for utilizing waste heat of slag quenching water of blast furnace Download PDFInfo
- Publication number
- CN202415575U CN202415575U CN2011205480882U CN201120548088U CN202415575U CN 202415575 U CN202415575 U CN 202415575U CN 2011205480882 U CN2011205480882 U CN 2011205480882U CN 201120548088 U CN201120548088 U CN 201120548088U CN 202415575 U CN202415575 U CN 202415575U
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- CN
- China
- Prior art keywords
- water
- heating
- blast furnace
- type heat
- slag quenching
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-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B2400/00—Treatment of slags originating from iron or steel processes
- C21B2400/02—Physical or chemical treatment of slags
- C21B2400/022—Methods of cooling or quenching molten slag
- C21B2400/024—Methods of cooling or quenching molten slag with the direct use of steam or liquid coolants, e.g. water
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B2400/00—Treatment of slags originating from iron or steel processes
- C21B2400/05—Apparatus features
- C21B2400/066—Receptacle features where the slag is treated
- C21B2400/072—Tanks to collect the slag, e.g. water tank
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B2400/00—Treatment of slags originating from iron or steel processes
- C21B2400/08—Treatment of slags originating from iron or steel processes with energy recovery
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- Processing Of Solid Wastes (AREA)
Abstract
The utility model discloses a system for utilizing waste heat of slag quenching water of a blast furnace. The system is reasonable in structure, can utilize the waste heat effectively, occupies small space and can meet the heating requirement of living communities in winter. The system comprises a plurality of slurry pumps, wherein water intakes of the slurry pumps are formed in a sedimentation tank of the slag quenching water of the blast furnace; water outlets of the slurry pumps are connected with water inlets of a plurality of fiber bundle filters which are matched with each other; water outlets of the fiber bundle filters are connected with slag quenching water inlets of a plurality of plate type heat exchangers; slag quenching water outlets of the plate type heat exchangers are connected with the sedimentation tank through pipelines; heating circulating water return pipelines of heating pipelines are connected with corresponding circulating water pumps; the circulating water pumps are connected with heating circulating water inlets of the plate type heat exchangers; heating circulating water outlets of the plate type heat exchangers are connected with the heating pipelines; the slag quenching water inside the plate type heat exchangers is separated from heating circulating water, and the flowing direction of the slag quenching water is opposite to that of the heating circulating water; and the plate type heat exchangers, the circulating water pumps and the fiber bundle filters are connected with an intelligent monitoring system respectively.
Description
Technical field
The utility model relates to a kind of bootstrap system, relates in particular to a kind of blast furnace slag quenching water bootstrap system.
Background technology
The heat that blast furnace slag is taken away accounts for about 16% of blast furnace overall heat consumption.Every production 1t pig iron is wanted by-product 0.3～0.6t slag, and every production 1t steel is wanted by-product 0.13t slag, and slag per ton contains (1.26～1.88) * 10 approximately
6The sensible heat of kJ is equivalent to the energy of 30～40kg heavy oil, 45～60kg standard coal equivalent.The heat part of blast furnace slag is brought in the atmosphere through the water evaporation, and another part is taken away through flushing cinder water, in settling tank and pulp water ditch, scatters and disappears.
There is the INBA of employing method flush slag technology in steel mill at present.Its technical process is following: the high-temperature liquid state slag gets into the slag granulation district through the slag ditch, and grain slag Punched box ejection high velocity jet makes the slag water quenching cooling, forms granular grain slag.Slag-water slurry carries out pulp water and separates through water slag groove, grain slag groove and the grain slag divider drum filter of making a gift to someone.Grain slag after the filtration is delivered to pan tank by the grain slag adhesive tape conveyor and is stored with further dehydration and with the automobile outward transport, and the water that leaches gets into the granulation circulating water system through the water leg overflow, after the settling bowl cooling, sends into the grain slag Punched box again and recycles.
Through analysis to INBA method flushing cinder flow process; Flushing cinder water is also being born the function that grain slag is transported to grain slag groove and strainer except that punching out grain slag, cooled slag and equipment, so must guarantee certain discharge; Discharge is low excessively, can cause the deposition of slag in water slag groove.In the flushing cinder process, flushing cinder water absorbs the heat of slag, and self temperature raises, when reaching capacity temperature, and the water vapor of part flushing cinder, steam carries a large amount of heats and discharges through chimney.So the blast furnace slag waste heat is divided into two portions, a part is brought in the atmosphere through the water evaporation, and another part is taken away through flushing cinder water, in settling tank and pulp water ditch, scatters and disappears.This two portions heat is unfixed, if flushing cinder discharge is big, temperature in is low, and then the heat taken away of flushing cinder water is big, and the heat that steam is taken away is little.But the waste heat substantially constant that blast furnace slag is total, and that flushing cinder water flows out high furnace temperature is constant basically maintains (because the existence of air dividing potential drop is approximately about 90 ℃) near the vaporization temperature.This part heat lacks supporting recovery system at present, is in the waste state.
And the sub-district within steel mill's waste heat economic utilization scope; Face the heat supply in winter thermal source and select problem; The one, many no excess steam heating in winter in the factory, the 2nd, near heat power plant heat supply difficulty, the 3rd, the newly constructed boiler room faces the problems of investment, place, pollution, energy consumption.And on the other hand, having a large amount of blast furnace slag quenching water residual heat resources of not utilizing as yet in the steel mill, heating is a problem that presses for solution to the sub-district therefore how effectively to utilize the blast furnace slag quenching water waste heat recovery.
The utility model content
The purpose of the utility model provides a kind of blast furnace slag quenching water bootstrap system exactly for addressing the above problem, and it is rational in infrastructure, can effectively utilize waste heat, and occupation of land face is little, can satisfy the warming requirement of biotope.
For realizing above-mentioned purpose, the utility model adopts following technical scheme:
A kind of blast furnace slag quenching water bootstrap system; It comprises several slag stock pumps; The intake of slag stock pump is arranged on the settling tank of blast furnace slag quenching water; Water outlet is connected with the fiber bundle filter water-in that several match, and the water outlet of fiber bundle filter is connected with corresponding some plate-type heat exchanger flushing cinder water water-ins, and plate-type heat exchanger flushing cinder water water outlet is connected with settling tank through pipeline; The heating recirculated water water return pipeline of heating pipeline is connected with plate-type heat exchanger heating recirculated water water-in through corresponding water circulating pump simultaneously, and the heating recirculated water water outlet of plate-type heat exchanger is connected with heating pipeline; Flushing cinder water and heating recirculated water in the plate-type heat exchanger are separated, and both flow on the contrary; Plate-type heat exchanger, water circulating pump, fiber bundle filter are connected with intelligent monitor system respectively.
The water return pipeline of said heating pipeline is provided with the automatic pollution discharge strainer, and this water return pipeline also is connected with at least one chemicals dosing plant simultaneously.
Said chemicals dosing plant has two.
The water return pipeline of said heating pipeline also is connected with at least one membrane becomes expanded jar.
The water return pipeline of said heating pipeline also is connected with at least one frequency conversion small pump, and the frequency conversion small pump then is connected with at least one water tank, and water tank also is connected with the tap water water pipe through at least one automatic water softening device simultaneously.
Said fiber bundle filter adopts the back flushing high-efficiency fiber to filter unit.
The inlet pipe of said fiber bundle filter is connected with corresponding roots blower, and the back flushing water inlet pipe is connected with corresponding recoil washery slag stock pump.
The utility model is set up the blast furnace slag quenching water heat exchange station of an exchange capability of heat every high sole, utilize the slag stock pump to extract settling tank upper reaches flushing cinder water, after fiber bundle filter filtration, plate-type heat exchanger heat exchange, is passed to heating system outward.
The working process of the utility model is: the about 85 ℃ blast furnace slag flushing primary water of top temperature promotes through the slag stock pump; Delivering to high-efficiency fiber beam filter device filters; Flushing cinder water after the filtration gets into efficient plate-type heat exchanger heat exchange as primary water; Water after the heat exchange (clean tap water) is used for heating, and temperature is about 65 ℃.The heating pressure of supply water is 0.65MPa.Heating backwater overbottom pressure 0.45MPa, about 50 ℃ of return water temperature returns plate-type heat exchanger and primary water again and carries out heat exchange, recycles.Flushing cinder water and heating recirculated water (secondary circulation water) are separated by the interchanger plate, do not intersect mutually, have guaranteed the cleaning of secondary water.Successfully solved the difficult problem that flushing cinder water direct-furnish user causes user's radiator burn into to stop up.Blast furnace slag quenching water after high-efficiency fiber beam filter device filters the water outlet suspension content less than 20mg/L; The flushing cinder water timing automatic that recoil washery slag stock pump is drawn after filtering is carried out water backwashing to high-efficiency fiber beam filter device, and the roots blower timing automatic is carried out the gas back flushing to high-efficiency fiber beam filter device.
The variation of Along with season and weather; The sub-district thermal load changes; The utility model designs a cover intelligent monitor system for heating system specially, and this system is a core with high-power siemens frequency conversion tank and supervisory system thereof, and water circulating pump, the fiber bundle filter of frequency conversion are monitored in real time.The filtering back flushing frequency of platform number, rotating speed and fiber bundle filter that can Control Circulation water pump start-stop; And then control interchanger effluent temperature constancy; Thereby solve " tap cinder is discontinuous; the pulp water temperature variation is big, and the interchanger continous-stable goes out the technical barrier of hot water ", reach further purpose of energy saving.
The beneficial effect of the utility model is: at the design area of heat-supply service is 500,000 m
2, during heat load 25000KW, power consumption 800KW during actual motion so the heat of every acquisition 1KWh need consume the electric energy of 0.032KWh, is about 0.02 yuan.Every kilogram of coal of coal firing boiler produces the heat of about 6000 kilocalories, general boiler efficiency 74% more than 10 tons, and it is 5.2KWh/kg that reality can obtain available heat.The market price of coal is got 600 yuan/ton, i.e. 0.6/Kg.The heat of then every acquisition 1KWh need consume 0.12 yuan.General 8500 kilocalories that produce of the every cubic natural gas of combustion gas (Sweet natural gas) boiler close 9.8KWh.General boiler efficiency more than 10 tons is 85%, and actual obtainable heat is 8.4KWh.With the market for natural gas price is 2.8 yuan/m
3Calculate, the heat of every acquisition 1KWh need consume 0.33 yuan.The every square meter load of central heating closes 0.05KW/m generally at 50W
2Promptly in heating area at 500,000 m
2Annual expense is that the utility model is 1,800,000, coal firing boiler 7,200,000, gas fired-boiler 2,040 ten thousand, central heating 1,180 ten thousand.The utility model is shorter payback period.Be enterprise's joint money, economize on electricity, water saving.And reached environmental protection requirement.Simultaneously also improve production technique efficient, reduced production cost.Bring following several respects benefit simultaneously: practice thrift coal-fired nearly 12000 tons; Reduce about 30720 tons of CO2 emissions; Reduce about 435 tons of sulphur dioxide emission; Reduce about 7.6 tons of hydrocarbon emission amount; Reduce about 56 tons of nitrogen oxide emission; Reduce about 713 tons of smoke discharge amount; Reduce about 3481 tons of lime-ash quantity discharged.
Description of drawings
Fig. 1 is the system construction drawing of the utility model.
Wherein, 1. slag stock pump, 2. settling tank, 3. fiber bundle filter; 4. plate-type heat exchanger, 5. water circulating pump, 6. heating pipeline, 7. roots blower; 8 frequency conversion small pumps, the 9. automatic soft water machine that changes, 10. water tank, 11. membrane becomes expanded jars; 12. the automatic pollution discharge strainer, 13. chemicals dosing plants, 14. recoil washery slag stock pumps.
Embodiment
Below in conjunction with accompanying drawing and embodiment the utility model is further specified.
Among Fig. 1, Fig. 2, Fig. 3; A kind of blast furnace slag quenching water bootstrap system; It comprises the blast furnace slag quenching water heat exchange station supporting with blast furnace, utilizes slag stock pump 1 to extract settling tank 2 downstream flushing cinder water, and the intake of slag stock pump 1 is arranged on the settling tank 2 of blast furnace slag quenching water; Water outlet is connected with several fiber bundle filter that matches 3 water-ins, and the water outlet of fiber bundle filter 3 is connected with corresponding some plate-type heat exchanger 4 flushing cinder water water-ins; Simultaneously the heating recirculated water water return pipeline of heating pipeline 6 is connected with water circulating pump 5 accordingly, and 5 in water circulating pump is connected with plate-type heat exchanger 4 heating water water-ins, and the heating recirculated water water outlet of plate-type heat exchanger 4 is connected with heating pipeline 6; Flushing cinder water and heating recirculated water in the plate-type heat exchanger 4 are separated; Plate-type heat exchanger 4, water circulating pump 5, fiber bundle filter 3 are connected with intelligent monitor system respectively.
The water return pipeline of heating pipeline 6 is provided with automatic pollution discharge strainer 12, and this water return pipeline also is connected with two chemicals dosing plants 13 simultaneously.
The water return pipeline of heating pipeline 6 is connected with two membrane becomes expanded jars 11.Membrane becomes expanded jar 11 is through pipeline and the total pipe coupling of heating recirculated water water return pipeline, rise regulate pressure among a small circle, short period of time variation purpose, prevent frequency conversion small pump frequent starting.
The water return pipeline of heating pipeline 6 also is connected with two frequency conversion small pumps 8, and 8 of frequency conversion small pumps are connected 10 with a stainless steel assembled water tank, and the stainless steel assembled water tank connects 10 and is connected with the tap water water pipe through automatic softening water machine 9 simultaneously
Fiber bundle filter 3 adopts the back flushing high-efficiency fiber to filter unit.Fiber bundle filter 3 is connected with recoil washery slag stock pump 14 with corresponding roots blower 7.
Plate-type heat exchanger 4 flushing cinder discharges are 800m
3/ h; The heating circulating water flow is 700m
3/ h.Flushing cinder water and heating recirculated water (secondary circulation water) are separated by the plate of plate-type heat exchanger 4, do not intersect mutually, have guaranteed the cleaning of secondary water.Heat exchange station is placed in vacant lot, limit, flushing cinder pond place, and former flushing cinder water system intake need be done corresponding transformation, so as not to flushing cinder pond water charging system and blast furnace slag flushing water pump string water, influence the heating effect.
Fiber bundle filter 3 adopts the back flushing high-efficiency fiber to filter unit.The blast furnace slag quenching water complicated component after settling tank is handled, through actual sample examination, contains materials such as silicates, iron scale particle, slag fibre; The about 100mg/L of the mass concentration of turbidity, the about 1280mg/L of chlorine ion concentration, the pH value of water is about 8; Proportion is about 1.1, largest solid particle particle diameter 5mm, minimum grain size≤2mm; Temperature is higher, before getting into plate-type heat exchanger, needs to make suspended substance less than 20mg/L through filter process.
The full-automatic back washing high-efficiency fiber beam filter device 3 that the utility model is selected for use is handled water yield 380m
3/ h, filtering velocity V=40m/h, water inlet suspended substance>=100mg/L goes out water suspension≤20mg/L.Advantages such as this fiber bundle filter 3 adopts fiber as filter unit, and it is big to have specific surface area, and filtration resistance is little, the filtering accuracy that has solved particulate filter receives problems such as particle diameter of filter medium restriction, thereby has improved filtration efficiency and retaining power.Have that filtration velocity is fast, precision is high, retaining power is big, easy to operate, reliable, do not need advantages such as special maintenance.
Plate-type heat exchanger 4 is self-stip full welded plate formula interchanger, has heat transfer coefficient height, little, corrosion-resistant, the anti-fouling of occupation of land face and is convenient to characteristics such as cleaning.Plate-type heat exchanger 4 adopts horizontal through type plate, and waved plate is inverted each other, makes water between waved plate, be the rotation triflux in the runner, and heat transfer coefficient is 3～5 times of shell-and-tube up to 4000kcal/m2 ℃ of h; Plate-type heat exchanger 4 leans on fishbolt that the clamping plate plate is clamped, so easy accessibility, can open cleaning at any time, and simultaneously, the upper and lower end face of plate-type heat exchanger is provided with sewage draining exit, can be when interchanger be worked automatic periodic blow down; Plate-type heat exchanger 4 plate faces are bright and clean, and turbulent extent is high, and less scaling, its scale coefficient is merely 1/3～1/10 of tube and shell heat exchanger.Plate-type heat exchanger 4 adopts the thick 317L stainless steel compacting of 1mm to form, compact construction, and floor space is about 1/5～1/8 of tube and shell heat exchanger.
Claims (7)
1. blast furnace slag quenching water bootstrap system; It is characterized in that; It comprises several slag stock pumps, and the intake of slag stock pump is arranged on the settling tank of blast furnace slag quenching water, and water outlet is connected with the fiber bundle filter water-in that several match; The water outlet of fiber bundle filter is connected with corresponding some plate-type heat exchanger flushing cinder water water-ins, and plate-type heat exchanger flushing cinder water water outlet is connected with settling tank through pipeline; The heating recirculated water water return pipeline of heating pipeline is connected with plate-type heat exchanger heating recirculated water water-in through corresponding water circulating pump simultaneously, and the heating recirculated water water outlet of plate-type heat exchanger is connected with heating pipeline; Flushing cinder water and heating recirculated water in the plate-type heat exchanger are separated, and both flow on the contrary; Plate-type heat exchanger, water circulating pump, fiber bundle filter are connected with intelligent monitor system respectively.
2. blast furnace slag quenching water bootstrap system as claimed in claim 1 is characterized in that, the heating recirculated water water return pipeline of said heating pipeline is provided with the automatic pollution discharge strainer, and this water return pipeline also is connected with at least one chemicals dosing plant simultaneously.
3. blast furnace slag quenching water bootstrap system as claimed in claim 2 is characterized in that, said chemicals dosing plant has two.
4. according to claim 1 or claim 2 blast furnace slag quenching water bootstrap system is characterized in that said heating recirculated water water return pipeline also is connected with at least one membrane becomes expanded jar.
5. blast furnace slag quenching water bootstrap system as claimed in claim 1; It is characterized in that; Said heating recirculated water water return pipeline also is connected with at least one frequency conversion small pump; The frequency conversion small pump then is connected with at least one water tank, and water tank also is connected with the tap water water pipe through at least one automatic water softening device simultaneously.
6. blast furnace slag quenching water bootstrap system as claimed in claim 1 is characterized in that, said fiber bundle filter adopts the back flushing high-efficiency fiber to filter unit.
7. like claim 1 or 6 described blast furnace slag quenching water bootstrap systems, it is characterized in that said fiber bundle filter is connected with recoil washery slag stock pump with corresponding roots blower.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205480882U CN202415575U (en) | 2011-12-23 | 2011-12-23 | System for utilizing waste heat of slag quenching water of blast furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205480882U CN202415575U (en) | 2011-12-23 | 2011-12-23 | System for utilizing waste heat of slag quenching water of blast furnace |
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| CN202415575U true CN202415575U (en) | 2012-09-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2011205480882U Expired - Fee Related CN202415575U (en) | 2011-12-23 | 2011-12-23 | System for utilizing waste heat of slag quenching water of blast furnace |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107131769A (en) * | 2016-02-26 | 2017-09-05 | 中色十二冶金建设有限公司 | The method and device of baking furnace fume UTILIZATION OF VESIDUAL HEAT IN |
| CN107586904A (en) * | 2017-09-29 | 2018-01-16 | 四川德胜集团钒钛有限公司 | A kind of circulation water of blast furnace utilization system |
| CN109945174A (en) * | 2019-04-04 | 2019-06-28 | 华北水利水电大学 | Wet bottom boiler washing slag water closed cycle utilizes system |
| CN113842683A (en) * | 2021-09-27 | 2021-12-28 | 中冶赛迪工程技术股份有限公司 | System for backwashing grain slag filter layer by gas-liquid two-phase flow and backwashing method thereof |
-
2011
- 2011-12-23 CN CN2011205480882U patent/CN202415575U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107131769A (en) * | 2016-02-26 | 2017-09-05 | 中色十二冶金建设有限公司 | The method and device of baking furnace fume UTILIZATION OF VESIDUAL HEAT IN |
| CN107586904A (en) * | 2017-09-29 | 2018-01-16 | 四川德胜集团钒钛有限公司 | A kind of circulation water of blast furnace utilization system |
| CN109945174A (en) * | 2019-04-04 | 2019-06-28 | 华北水利水电大学 | Wet bottom boiler washing slag water closed cycle utilizes system |
| CN109945174B (en) * | 2019-04-04 | 2024-02-13 | 华北水利水电大学 | Slag flushing water closed circulation utilization system of liquid slag discharging boiler |
| CN113842683A (en) * | 2021-09-27 | 2021-12-28 | 中冶赛迪工程技术股份有限公司 | System for backwashing grain slag filter layer by gas-liquid two-phase flow and backwashing method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120905 Termination date: 20121223 |